What expenses does the property company include for cleaning the domestic water tank?

Cleaning and testing costs, generally speaking, this industry is a monopoly industry, that is to say, you find a cleaning company, which is responsible for the qualification of water quality testing. If the company cleans itself up, it may be unqualified, leading to more futility. I suggest you ask the local cleaning company. This price should not be very high. Generally, the price will be obtained on the spot, and the price of telephone consultation is too high.